IWR1843: What's the accurary of slope of FMCW?

Jun Fang

Part Number: IWR1843

Hi,

What's the accurary of frequency slope during running when I set it in the chirp configuration? I thinks it's very high, since distance d = fc/2s, and c is very large.

Thanks.

over 1 year ago

0 Jun Fang over 1 year ago

Prodigy 170 points

Can anybody give some tips? Thanks.

0 Josh Dye over 1 year ago in reply to Jun Fang

TI__Genius 12791 points

Hi,

I apologize for the late response here. On 1843 device, our non-linearity, or peak frequency error is < 0.01 % of the chirp sweep bandwidth. We measure this by capturing the RF out from the transmitter and compare the frequency vs time plot of the TX o/p with the ideal chirp ramp freq vs time.

Best Regards,
Josh

0 Jun Fang over 1 year ago in reply to Josh Dye

Prodigy 170 points

Hi, Josh,

Appreciate your reply. I have one related question. How long does the frequency error reach 0.01% in your experiment.

Thanks.

0 Josh Dye over 1 year ago in reply to Jun Fang

TI__Genius 12791 points

Hello,

My apologies once again for the delayed response. This testing was done a while back and I do not have the full details. Let me reach out internally to find the answer and I will provide an update here when I have more information. You can expect a response here no later than wednesday.

Best Regards,

Josh

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IWR1843: What's the accurary of slope of FMCW?